<template>
  <div class="w-full h-full flex relative">
<!--    <div class="lg:w-1/2 sm:w-0 h-full  bg-center bg-scroll bg-cover " :style="{backgroundImage:`url(${bgimg})`}"></div>-->
    <div class="lg:w-full sm:w-full w-full h-full juzhong1 flex-col">
     <div class="lg:w-1/2 sm:w-3/5 w-3/5 bg-white bg-opacity-30 rounded px-10 py-5">
       <div class="juzhong1">logo</div>
       <div class="juzhong1">自我简介</div>
       <n-tabs default-value="signin" size="large" justify-content="space-evenly">
         <n-tab-pane name="signin" tab="登录">
           <denglu></denglu>
         </n-tab-pane>
         <n-tab-pane name="signup" tab="注册">
           <zhuce></zhuce>
         </n-tab-pane>
       </n-tabs>
     </div>
    </div>
    <canvas id="canvas" class="absolute inset-0 -z-1"></canvas>
  </div>
</template>

<script setup name="login">
import {useRoute, useRouter} from "vue-router";
import uselocalStorage from "../../hooks/uselocalstorage";
import http from "@/request/request"
import denglu from "./denglu.vue"
import zhuce from "./zhuce.vue"
const router = useRouter()
const route = useRoute()
const loginimg = uselocalStorage("loginimg")
const bgimg = computed(() => {
  return loginimg.value ? loginimg.value: "http://101.43.194.47:9000/file/4588953843274878977"
})
// 测试按钮
const dianji=()=>{
  http.login({username:"2132"}).then(res=>{
    console.log(res)
  })
}
// 生命周期区域
onMounted(()=>{
  if (!loginimg.value){
    loginimg.value = "http://101.43.194.47:9000/file/4588953843274878977"
  }
})

// 星空特效
const texiao=()=>{
  //宇宙特效
  "use strict";
  let canvas = document.getElementById('canvas'),
      ctx = canvas.getContext('2d'),
      w = canvas.width = window.innerWidth,
      h = canvas.height = window.innerHeight,
      hue = 217,
      stars = [],
      count = 0,
      maxStars = 2500//星星数量

  const canvas2 = document.createElement('canvas'),
      ctx2 = canvas2.getContext('2d')
  canvas2.width = 100;
  canvas2.height = 100;
  const half = canvas2.width / 2,
      gradient2 = ctx2.createRadialGradient(half, half, 0, half, half, half)
  gradient2.addColorStop(0.025, '#CCC');
  gradient2.addColorStop(0.1, 'hsl(' + hue + ', 61%, 33%)');
  gradient2.addColorStop(0.25, 'hsl(' + hue + ', 64%, 6%)');
  gradient2.addColorStop(1, 'transparent');

  ctx2.fillStyle = gradient2;
  ctx2.beginPath();
  ctx2.arc(half, half, half, 0, Math.PI * 2);
  ctx2.fill();

  // End cache

  function random(min, max) {
    if (arguments.length < 2) {
      max = min;
      min = 0;
    }

    if (min > max) {
      const hold = max
      max = min;
      min = hold;
    }

    return Math.floor(Math.random() * (max - min + 1)) + min;
  }

  function maxOrbit(x, y) {
    const max = Math.max(x, y),
        diameter = Math.round(Math.sqrt(max * max + max * max))
    return diameter / 2;
    //星星移动范围，值越大范围越小，
  }

  const Star = function () {

    this.orbitRadius = random(maxOrbit(w, h));
    this.radius = random(60, this.orbitRadius) / 18;
    //星星大小
    this.orbitX = w / 2;
    this.orbitY = h / 2;
    this.timePassed = random(0, maxStars);
    this.speed = random(this.orbitRadius) / 500000;
    //星星移动速度
    this.alpha = random(2, 10) / 10;

    count++;
    stars[count] = this;
  }

  Star.prototype.draw = function() {
    const x = Math.sin(this.timePassed) * this.orbitRadius + this.orbitX,
        y = Math.cos(this.timePassed) * this.orbitRadius + this.orbitY,
        twinkle = random(10)

    if (twinkle === 1 && this.alpha > 0) {
      this.alpha -= 0.05;
    } else if (twinkle === 2 && this.alpha < 1) {
      this.alpha += 0.05;
    }

    ctx.globalAlpha = this.alpha;
    ctx.drawImage(canvas2, x - this.radius / 2, y - this.radius / 2, this.radius, this.radius);
    this.timePassed += this.speed;
  }

  for (let i = 0; i < maxStars; i++) {
    new Star();
  }

  function animation() {
    ctx.globalCompositeOperation = 'source-over';
    ctx.globalAlpha = 0.5; //尾巴
    ctx.fillStyle = 'hsla(' + hue + ', 64%, 6%, 2)';
    ctx.fillRect(0, 0, w, h)

    ctx.globalCompositeOperation = 'lighter';
    let i = 1, l = stars.length
    for (; i < l; i++) {
      stars[i].draw();
    };

    window.requestAnimationFrame(animation);
  }

  animation();
}

//

onMounted(()=>{
  texiao()
  window.addEventListener("resize",()=>{
    texiao()
  })
})
onUnmounted(()=>{
  window.removeEventListener("resize",()=>{
    texiao()
  })
})
</script>

<style scoped>

</style>